Autonomous System in BGP

Autonomous System in BGP

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Subject Author Date
Autonomous System in BGP abbas.s 04-19-2005
Posted by on April 19, 2005, 2:51 am
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Hi all,
I am new to this group. I am studying CCNA and i have a doubt. I like
to know what is the use of 'Autonomous System" in BGP and how it will
work with this number?

Thanks in advance for all ur help.

Best Regards,
Bas



Pure Networks
Posted by Arnold Nipper on April 19, 2005, 12:44 pm
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On 19.04.2005 11:51 abbas.s@gmail.com wrote

> Hi all,
> I am new to this group. I am studying CCNA and i have a doubt. I like
> to know what is the use of 'Autonomous System" in BGP and how it will
> work with this number?
>

From
http://www.cisco.com/en/US/tech/tk365/technologies_q_and_a_item09186a00800949e8.shtml#eight

Q. What is an autonomous system number and how do I obtain one?

A. AS numbers are globally unique numbers that are used to identify
ASes, and which enable an AS to exchange exterior routing information
between neighboring ASes. An AS is a connected group of IP networks that
adhere to a single and clearly defined routing policy.

There are a limited number of available AS numbers. Therefore, it
is important to determine which sites require unique AS numbers and
which do not. Sites that do not require a unique AS number should use
one or more of the AS numbers reserved for private use, which are in the
range from 64512 to 65535. Access the AS Number Registration Services
leavingcisco.com Website to obtain an AS number.




Arnold
--
Arnold Nipper, AN45


Posted by on April 19, 2005, 3:57 am
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Thanks for ur help Arnold

Regards,
//Bas



Posted by Brad on April 19, 2005, 8:53 am
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The concept of an AS in BGP is kind of analogous to an area in OSPF.



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other useful resources:
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